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Touch screen positioning device and method thereof

A technology for positioning devices and touch screens, applied in televisions, instruments, electrical digital data processing, etc., can solve the problems of limited flexibility and convenience, complex image processing algorithms and positioning algorithms, and image synchronization, so as to improve the flexibility of use and convenience, improve the ability to resist external light interference, and improve the effect of environmental adaptability

Active Publication Date: 2007-03-14
GUANGDONG VTRON TECH CO LTD
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  • Abstract
  • Description
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AI Technical Summary

Problems solved by technology

[0004] 1. The system structure is relatively complex, requiring multiple cameras to work at the same time, and it is necessary to solve the problem of image synchronization between different cameras
[0005] 2. Image processing algorithms and positioning algorithms are more complex
[0006] 3. Higher cost
[0009] 1. It is necessary to use an active luminescent pen as an image signal generation device, so the battery needs to be replaced or recharged frequently, which is extremely inconvenient in actual use; in addition, the luminous pen is an essential device, and once lost or damaged, the positioning device will fail. use, which greatly limits the flexibility and convenience of use
[0010] 2. Susceptible to interference from external ambient light
Using this solution, when the external ambient light is slightly strong, the system will be inaccurate or even unusable.

Method used

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  • Touch screen positioning device and method thereof
  • Touch screen positioning device and method thereof
  • Touch screen positioning device and method thereof

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Embodiment Construction

[0026] Please refer to Fig. 1, it is the first kind of structure diagram of touch screen positioning device of the present invention, and display screen 101 can be the projection screen of front projection display system, also can be the display screen of flat panel display device such as PDP, LCD or other types of display screen . The monochromatic linear light source 102 arranged parallel to the display screen 101 is installed on any side or any corner of the display screen and near the edge of the screen 101, so that the linear monochromatic light emitted is not only parallel to the screen, but also close to the screen as much as possible. It can cover the entire display area of ​​the screen. The light source can be a laser light source with linear processing, or other types of light source with monochromatic processing; it can be a visible light monochromatic light source, or an infrared or ultraviolet monochromatic light source. Considering the fan angle and brightness of...

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Abstract

The disclosed positioning device for touch pad comprises: a display screen, a DC or image inductor above screen for a given distance and fir to shoot whole screen, a mono-color line light source set at any side of corner of screen whose beam closes to screen as much as possible and covers whole screen; and a high-bright light spot detection module connected between the DC or inductor and computer. This invention simplifies structure and algorithm, and improves anti- disturbance ability.

Description

【Technical field】 [0001] The invention relates to a positioning device using a camera or an image sensor, in particular to a screen positioning device for a camera or an image sensor used as a touch screen and a positioning method thereof. 【Background technique】 [0002] Existing touch screen positioning device using camera, its system composition mainly contains two forms: one is to use two or more digital cameras such as CCD cameras to continuously acquire target images, and then utilize digital signal processor (DSP) to The images obtained by each camera are processed, and finally the images are synthesized and analyzed to calculate the position coordinates of the target on the screen. Similar technology is described in domestic patent application number 200510100255.6. [0003] With this solution, although the active luminous pen can be used without the use of an active luminous pen, the positioning is relatively accurate, but there are also the following deficiencies: ...

Claims

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Application Information

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IPC IPC(8): G06F3/041G06F3/00H04N5/225H04N5/14
Inventor 卢如西李军明
Owner GUANGDONG VTRON TECH CO LTD
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